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Finding the Fourth Proportional to 274,937.76, 379,402.64 and 155,705.76

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Solution

The fourth proportional to 274,937.76, 379,402.64 and 155,705.76 is: 214,867.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,937.76 : 379,402.64 = 155,705.76 : x
  2. Step 2: Convert to fraction form
    274,937.76/379,402.64 = 155,705.76/x
  3. Step 3: Cross multiply
    274,937.76x = 379,402.64 × 155,705.76
  4. Step 4: Simplify right side
    274,937.76x = 59,075,176,407.21
  5. Step 5: Solve for x
    x = 59,075,176,407.21/274,937.76
  6. Step 6: Final answer
    x = 214,867.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.